US20060089074A1 - Filamentary nonwoven bandage fabric - Google Patents
Filamentary nonwoven bandage fabric Download PDFInfo
- Publication number
- US20060089074A1 US20060089074A1 US10/545,132 US54513205A US2006089074A1 US 20060089074 A1 US20060089074 A1 US 20060089074A1 US 54513205 A US54513205 A US 54513205A US 2006089074 A1 US2006089074 A1 US 2006089074A1
- Authority
- US
- United States
- Prior art keywords
- filaments
- elastomeric
- batt
- produced according
- fabric produced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—Polyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H13/00—Other non-woven fabrics
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/013—Regenerated cellulose series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/015—Natural yarns or filaments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/07—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments otherwise than in a plane, e.g. in a tubular way
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
- D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1007—Running or continuous length work
- Y10T156/1015—Folding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/601—Nonwoven fabric has an elastic quality
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/689—Hydroentangled nonwoven fabric
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/697—Containing at least two chemically different strand or fiber materials
Definitions
- This invention concerns the manufacture of three-dimensional elastomeric nonwoven fabrics.
- spun filaments consisting preferably (but not essentially) of cellulosic material such as cellulose acetate or solvent spun rayon, not in yarn formats, are corrugated or crimped (these words being used synonymously herein) under controlled conditions into stabilized three dimensional batts.
- a proportion of filaments of a thermal memory material in a stretched format are included.
- These batts are then subjected to carefully controlled hydroentangling and a controlled heating treatment to yield three dimensional nonwoven fabrics with elastomeric properties due to the contraction of the stretched filaments
- These elastomeric properties can be adjusted to suit end-use requirements.
- Applications are envisaged in the medical and hygiene areas principally.
- soft, wet resilient, elastomeric, filamentary nonwoven fabrics can be produced using cellulose acetate or solvent spun rayon filaments and heat shrinkable filaments by a three stage process.
- the first stage is to assemble a multitude of conventionally spun cellulose acetate filaments, and interspace uniformly across such an assembly elastomeric shrinkable filaments in a stretched format. These elastomeric filaments will contract under controlled conditions and draw together all the remaining or adjacent filaments as an elastic band of any predetermined width.
- the assembly of filaments is then crimped and compressed by an overfeed process, such as a stuffer box or forced air/steam procedure, so that a band of corrugated filaments results. This band exhibits corrugations in all axes, “x”, “y” and “z”.
- a very simple light bonding technique by, for example, ultrasonic or point bonded thermal methods or specialist tacking by hydroentangling could be undertaken at this stage to further ensure the integrity and bulk of such batts in machine handling or packaging prior to the second stage.
- the second stage involves the hydroentanglement and drying of the batt into a 100% filamentary nonwoven structure exhibiting commendable controlled integrity, softness, thickness, wet strength and lint-freeness coupled with thermal insulatory protection. These are essential properties at the end of this second stage.
- the third stage involves a final heat treatment which can be applied uniformly or in suitable patterns or arrays to yield an elastomeric bandage type final product. This is due to the contraction of the heat stretched filaments present. Dependent on the pattern of heating applied, products with uniform overall elasticity or patterned elasticity in one or both axes result. On extension, lack of “necking” can be achieved. Nonwoven materials very similar to those seen, for example, in traditional woven or knitted creped bandage products result but with no yarns present.
- the completed nonwoven materials can be subjected to a final consolidation operation by appropriate bonding techniques to provide increased tensile strength or enhance other physical properties.
- Preferred consolidation procedures include thermal or ultrasonic bonding techniques which create raised/embossed zones to provide points or areas of bonding without compressing the nonwoven material.
- the process variables in such a three stage operation are such that resultant nonwoven fabrics can be engineered with degrees of controlled elasticity, softness, absorbency and strength to best suit the end use applications.
- the crimping operation can be varied to yield more or less three dimensionality and the degree and nature of the hydroentangling procedure can also be adjusted to provide different physical properties.
- variables in materials used can also be used to provide specific properties to products produced according to the present invention. It is possible to place two crimping operations in parallel prior to the hydroentanglement second stage. One crimping stage can be used to act on coarser filaments than the other stage thus resulting in filamentary nonwovens with one side exhibiting more surface resistance than the other. Other combinations of crimping stages (the process is not limited to three stages) can yield, for example, “sandwich” type materials with fine filaments surrounded by coarser filaments in the final batt entering the hydroentangling operation.
- modified polyester filaments which yield heat triggered contraction due to their inherent heat memory and hence product elasticity are preferred.
- Such filaments are commercially available from companies Trevira and EMS-Grylene.
- Other polymer systems known to those skilled in the art could also be used.
- contraction could be produced from other technologies such as by specialist ultrasonic techniques.
- solvent spun cellulose can be utilized as a single layer or in combination with cellulose acetate or it can be used as a total substitute for cellulose acetate. Crimping of solvent spun rayons is facilitated by heat and moisture if stuffer-box techniques are used since these filaments are more difficult to crimp than cellulose acetate.
- nonwovens made as described in this invention in medical and technically related hygiene products.
- materials other filament forming polymers to cellulose acetate and other celluloses can be considered. These include, but are not limited to, man-made biodegradable aliphatic polyesters which are based mainly on the industrial polymerisation of monomers such as glycolic acid (PGA), lactic acid (PLA), butyric acid (PHB), valeric acid (PHV) and caprolactone (PCL).
- PGA glycolic acid
- PLA lactic acid
- PHB butyric acid
- PV valeric acid
- PCL caprolactone
- Alginate filaments can also be incorporated into the present invention, in proportion to the other filament components or as a discrete filamentary layer or layers to provide optimum wound management in a specialist type of wound care dressing.
- FIG. 1 is a general view of a plant suitable for producing a preferred embodiment of the invention
- FIG. 2 is a general view of the crimping operation for producing a further embodiment of the invention.
- FIG. 3 is a diagrammatic view of a composite structure as described in this invention.
- FIG. 4 shows a completed bandage according to the processes described.
- a predetermined width of multifilament tow of cellulose acetate ( 1 ) as produced by spinning is drawn from a compressed bale ( 2 ) while stretched set filaments of an elastomeric memory polyester material are similarly drawn from a separate bale ( 3 ). Together, these filaments are stretched longitudinally and laterally between drafting rolls ( 4 ) ( 5 ) to form a straightened open sheet comprising a plurality of filaments.
- This sheet then enters a compaction unit ( 6 ), which may be a stuffer box as shown, at a greater linear speed than it exits the same.
- the width of the nonwoven is governed by the settings applied to the compaction unit ( 6 ).
- the resultant batt ( 7 ) comprises crimped intertwined filaments with sufficient integrity to withstand gentle handling.
- the batt ( 7 ) then passes to a second phase of the process where pre-wetting ( 8 ) followed by hydroentangling ( 9 ) takes place.
- pre-wetting ( 8 ) followed by hydroentangling ( 9 ) takes place.
- through-air drying ( 10 ) patterned heating to shrink the elastomeric filaments using a specialist heating system ( 12 ) and wind up ( 13 ) takes place.
- FIG. 2 illustrates another version of the compaction stage of the process whereby two compaction units ( 14 ) ( 15 ) are used to handle two different thicknesses of cellulose acetate filaments and stretched set polyester filaments, which are then combined as layers in a batt for further processing by hydroentangling.
- FIG. 3 shows in schematic form the filament deposition and placement in one embodiment of the finished nonwoven fabric and illustrates the reason for the three dimensionality and elasticity of the material. Loops of base material filament ( 16 ) and relaxed elastomeric filament ( 17 ) are observed passing in the “Z” axis of the nonwoven.
- FIG. 4 shows, in diagrammatic form, a top perspective of an example of a completed bandage according to the present invention, in this case exhibiting corrugated stretchable areas ( 18 ).
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
- This invention concerns the manufacture of three-dimensional elastomeric nonwoven fabrics.
- According to the invention, spun filaments, consisting preferably (but not essentially) of cellulosic material such as cellulose acetate or solvent spun rayon, not in yarn formats, are corrugated or crimped (these words being used synonymously herein) under controlled conditions into stabilized three dimensional batts. A proportion of filaments of a thermal memory material in a stretched format are included. These batts are then subjected to carefully controlled hydroentangling and a controlled heating treatment to yield three dimensional nonwoven fabrics with elastomeric properties due to the contraction of the stretched filaments These elastomeric properties can be adjusted to suit end-use requirements. Applications are envisaged in the medical and hygiene areas principally.
- Much prior art exists in the area of all cellulose nonwoven fabrics formed from filaments. This is well described in a paper “Advanced Cellulosic Nonwovens” presented at the Insight Conference, San Diego, November 1999 by C. R. Woodings. Despite the wide diversity of processes involved in producing filament bonded rayons, none has resulted in soft, three dimensional, wet resilient structures exhibiting controlled elasticity. Attempts to produce bonded cellulose acetate nonwovens using solvents e.g. triacetin resulted in stiff structures currently used in cigarette filters.
- It has now been determined that soft, wet resilient, elastomeric, filamentary nonwoven fabrics can be produced using cellulose acetate or solvent spun rayon filaments and heat shrinkable filaments by a three stage process.
- Taking cellulose acetate as a typical embodiment, the first stage is to assemble a multitude of conventionally spun cellulose acetate filaments, and interspace uniformly across such an assembly elastomeric shrinkable filaments in a stretched format. These elastomeric filaments will contract under controlled conditions and draw together all the remaining or adjacent filaments as an elastic band of any predetermined width. The assembly of filaments is then crimped and compressed by an overfeed process, such as a stuffer box or forced air/steam procedure, so that a band of corrugated filaments results. This band exhibits corrugations in all axes, “x”, “y” and “z”. These filament corrugations and the small degree of filament entanglement which result from such an operation yields a batt with sufficient strength and integrity to withstand machine handling (and packaging if desired) prior to the second stage.
- A very simple light bonding technique by, for example, ultrasonic or point bonded thermal methods or specialist tacking by hydroentangling could be undertaken at this stage to further ensure the integrity and bulk of such batts in machine handling or packaging prior to the second stage.
- The second stage involves the hydroentanglement and drying of the batt into a 100% filamentary nonwoven structure exhibiting commendable controlled integrity, softness, thickness, wet strength and lint-freeness coupled with thermal insulatory protection. These are essential properties at the end of this second stage.
- The third stage involves a final heat treatment which can be applied uniformly or in suitable patterns or arrays to yield an elastomeric bandage type final product. This is due to the contraction of the heat stretched filaments present. Dependent on the pattern of heating applied, products with uniform overall elasticity or patterned elasticity in one or both axes result. On extension, lack of “necking” can be achieved. Nonwoven materials very similar to those seen, for example, in traditional woven or knitted creped bandage products result but with no yarns present.
- Optionally, the completed nonwoven materials can be subjected to a final consolidation operation by appropriate bonding techniques to provide increased tensile strength or enhance other physical properties. Preferred consolidation procedures include thermal or ultrasonic bonding techniques which create raised/embossed zones to provide points or areas of bonding without compressing the nonwoven material.
- The process variables in such a three stage operation are such that resultant nonwoven fabrics can be engineered with degrees of controlled elasticity, softness, absorbency and strength to best suit the end use applications. The crimping operation can be varied to yield more or less three dimensionality and the degree and nature of the hydroentangling procedure can also be adjusted to provide different physical properties.
- The variables in materials used can also be used to provide specific properties to products produced according to the present invention. It is possible to place two crimping operations in parallel prior to the hydroentanglement second stage. One crimping stage can be used to act on coarser filaments than the other stage thus resulting in filamentary nonwovens with one side exhibiting more surface resistance than the other. Other combinations of crimping stages (the process is not limited to three stages) can yield, for example, “sandwich” type materials with fine filaments surrounded by coarser filaments in the final batt entering the hydroentangling operation.
- For this invention, modified polyester filaments which yield heat triggered contraction due to their inherent heat memory and hence product elasticity are preferred. Such filaments are commercially available from companies Trevira and EMS-Grylene. Other polymer systems known to those skilled in the art could also be used. Furthermore contraction could be produced from other technologies such as by specialist ultrasonic techniques.
- It is possible to use other types of cellulose, alone or in combination in such a three stage process to yield 100% binder free three-dimensional filament nonwovens. For example, solvent spun cellulose (or “Lyocell”) can be utilized as a single layer or in combination with cellulose acetate or it can be used as a total substitute for cellulose acetate. Crimping of solvent spun rayons is facilitated by heat and moisture if stuffer-box techniques are used since these filaments are more difficult to crimp than cellulose acetate.
- Further variations will be obvious to those skilled in the art including the incorporation of synthetic filaments such as non-heat contractible polyolefins, polyamides or polyesters as crimped layers.
- It is possible to convert the completed nonwoven material into completed bandage products of various types. These products can themselves, without further processing or additions, constitute finished bandages.
- Further materials and further applications are possible for nonwovens made as described in this invention in medical and technically related hygiene products. As regards materials, other filament forming polymers to cellulose acetate and other celluloses can be considered. These include, but are not limited to, man-made biodegradable aliphatic polyesters which are based mainly on the industrial polymerisation of monomers such as glycolic acid (PGA), lactic acid (PLA), butyric acid (PHB), valeric acid (PHV) and caprolactone (PCL). These materials may be used in the present invention in combination with elastomeric polymers (in filament forms) as described, instead of or with cellulose acetate or other cellulosic material. These materials and their copolymers have already found application in implants, absorbable sutures, controlled release packaging and degradable films and mouldings, and the same products/end uses could be supplied using the manufacturing process of the present invention.
- Alginate filaments can also be incorporated into the present invention, in proportion to the other filament components or as a discrete filamentary layer or layers to provide optimum wound management in a specialist type of wound care dressing.
- This invention is illustrated by the following diagrams in which:
-
FIG. 1 is a general view of a plant suitable for producing a preferred embodiment of the invention; -
FIG. 2 is a general view of the crimping operation for producing a further embodiment of the invention; -
FIG. 3 is a diagrammatic view of a composite structure as described in this invention; and -
FIG. 4 shows a completed bandage according to the processes described. - In
FIG. 1 , a predetermined width of multifilament tow of cellulose acetate (1) as produced by spinning is drawn from a compressed bale (2) while stretched set filaments of an elastomeric memory polyester material are similarly drawn from a separate bale (3). Together, these filaments are stretched longitudinally and laterally between drafting rolls (4) (5) to form a straightened open sheet comprising a plurality of filaments. This sheet then enters a compaction unit (6), which may be a stuffer box as shown, at a greater linear speed than it exits the same. The width of the nonwoven is governed by the settings applied to the compaction unit (6). The resultant batt (7) comprises crimped intertwined filaments with sufficient integrity to withstand gentle handling. In this case, the batt (7) then passes to a second phase of the process where pre-wetting (8) followed by hydroentangling (9) takes place. As a final stage, through-air drying (10), patterned heating to shrink the elastomeric filaments using a specialist heating system (12) and wind up (13) takes place. -
FIG. 2 illustrates another version of the compaction stage of the process whereby two compaction units (14) (15) are used to handle two different thicknesses of cellulose acetate filaments and stretched set polyester filaments, which are then combined as layers in a batt for further processing by hydroentangling. -
FIG. 3 shows in schematic form the filament deposition and placement in one embodiment of the finished nonwoven fabric and illustrates the reason for the three dimensionality and elasticity of the material. Loops of base material filament (16) and relaxed elastomeric filament (17) are observed passing in the “Z” axis of the nonwoven. -
FIG. 4 shows, in diagrammatic form, a top perspective of an example of a completed bandage according to the present invention, in this case exhibiting corrugated stretchable areas (18). - Optional additional bonding to provide added handling integrity and strength to the material may then ensue.
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0303295.0A GB0303295D0 (en) | 2003-02-13 | 2003-02-13 | Filamentary nonwoven bandage fabric |
GB0303295.0 | 2003-02-13 | ||
PCT/GB2004/000382 WO2004072347A1 (en) | 2003-02-13 | 2004-02-05 | Filamentary nonwoven bandage fabric |
Publications (2)
Publication Number | Publication Date |
---|---|
US20060089074A1 true US20060089074A1 (en) | 2006-04-27 |
US7361241B2 US7361241B2 (en) | 2008-04-22 |
Family
ID=9952944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/545,132 Expired - Fee Related US7361241B2 (en) | 2003-02-13 | 2004-02-05 | Filamentary nonwoven bandage fabric |
Country Status (5)
Country | Link |
---|---|
US (1) | US7361241B2 (en) |
EP (1) | EP1595017B1 (en) |
JP (1) | JP2006518427A (en) |
GB (1) | GB0303295D0 (en) |
WO (1) | WO2004072347A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080113574A1 (en) * | 2006-11-14 | 2008-05-15 | Neron Rene B | Wound care product made from bulked filament tow |
US20080311350A1 (en) * | 2007-06-13 | 2008-12-18 | Hanson James P | Unitized composites utilizing shrinkable layers to achieve surface texture and bulk |
US20090036016A1 (en) * | 2007-08-02 | 2009-02-05 | Robertson Raymond M | Nonwoven from bulked filament tow |
US20110172624A1 (en) * | 2008-09-22 | 2011-07-14 | Lenzing Aktiengesellschaft | Use of lyocell fibers as well as articles containing lyocell fibers |
CN106536798A (en) * | 2014-06-24 | 2017-03-22 | 可隆工业株式会社 | Filament web type precursor fabric for activated carbon fiber fabric and method for preparing same |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2900419B1 (en) * | 2006-04-26 | 2009-02-13 | Schlumberger Sa N | METHOD OF MANUFACTURING NON-WOVEN FABRIC IN THREE DIMENSIONS, MANUFACTURING LINE FOR CARRYING OUT SAID METHOD, AND NON-WOVEN PRODUCT IN THREE DIMENSIONS OBTAINED |
GB0817796D0 (en) * | 2008-09-29 | 2008-11-05 | Convatec Inc | wound dressing |
EP3082672B1 (en) | 2013-12-19 | 2018-06-27 | 3M Innovative Properties Company | Viscoelastic medical article |
WO2016033226A1 (en) | 2014-08-26 | 2016-03-03 | Curt G. Joa, Inc. | Apparatus and methods for securing elastic to a carrier web |
US11701268B2 (en) | 2018-01-29 | 2023-07-18 | Curt G. Joa, Inc. | Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product |
US11925538B2 (en) | 2019-01-07 | 2024-03-12 | Curt G. Joa, Inc. | Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product |
US11173072B2 (en) | 2019-09-05 | 2021-11-16 | Curt G. Joa, Inc. | Curved elastic with entrapment |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4209563A (en) * | 1975-06-06 | 1980-06-24 | The Procter & Gamble Company | Method for making random laid bonded continuous filament cloth |
US5219633A (en) * | 1991-03-20 | 1993-06-15 | Tuff Spun Fabrics, Inc. | Composite fabrics comprising continuous filaments locked in place by intermingled melt blown fibers and methods and apparatus for making |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH1490664A4 (en) * | 1963-11-21 | 1969-02-28 | Celanese Corp | Process for the manufacture of a diaphanous and porous web of continuous crimped textile filaments, a web obtained by this process, and use of this web |
JPH02182963A (en) * | 1989-01-06 | 1990-07-17 | Asahi Chem Ind Co Ltd | Heat-shrinkable filament nonwoven sheet and production thereof |
CA2106461A1 (en) * | 1991-03-20 | 1992-09-21 | Reinhardt N. Sabee | Elasticized fabric with continuous filaments and method of forming |
WO1992016371A1 (en) * | 1991-03-20 | 1992-10-01 | Sabee Reinhardt N | Elasticized pregathered web |
JP3345471B2 (en) * | 1993-07-21 | 2002-11-18 | 日本バイリーン株式会社 | Medical auxiliary materials |
JP2986689B2 (en) * | 1994-08-29 | 1999-12-06 | ユニ・チャーム株式会社 | Manufacturing method of nonwoven wiper |
JP3657700B2 (en) * | 1996-06-18 | 2005-06-08 | 新日本石油化学株式会社 | Method for producing high-quality nonwoven fabric |
CN1254576C (en) * | 2000-04-18 | 2006-05-03 | 乐曼两合有限公司 | Non-woven textile structure incorporating stabilized filament assemblies |
-
2003
- 2003-02-13 GB GBGB0303295.0A patent/GB0303295D0/en not_active Ceased
-
2004
- 2004-02-05 WO PCT/GB2004/000382 patent/WO2004072347A1/en active Application Filing
- 2004-02-05 US US10/545,132 patent/US7361241B2/en not_active Expired - Fee Related
- 2004-02-05 EP EP04708384A patent/EP1595017B1/en not_active Expired - Lifetime
- 2004-02-05 JP JP2006502219A patent/JP2006518427A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4209563A (en) * | 1975-06-06 | 1980-06-24 | The Procter & Gamble Company | Method for making random laid bonded continuous filament cloth |
US5219633A (en) * | 1991-03-20 | 1993-06-15 | Tuff Spun Fabrics, Inc. | Composite fabrics comprising continuous filaments locked in place by intermingled melt blown fibers and methods and apparatus for making |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080113574A1 (en) * | 2006-11-14 | 2008-05-15 | Neron Rene B | Wound care product made from bulked filament tow |
US20090287131A1 (en) * | 2006-11-14 | 2009-11-19 | Neron Rene B | Wound care product made from bulked filament tow |
US20080311350A1 (en) * | 2007-06-13 | 2008-12-18 | Hanson James P | Unitized composites utilizing shrinkable layers to achieve surface texture and bulk |
US20090036016A1 (en) * | 2007-08-02 | 2009-02-05 | Robertson Raymond M | Nonwoven from bulked filament tow |
EP2193229A1 (en) * | 2007-08-02 | 2010-06-09 | Celanese Acetate LLC | Nonwoven from bulked filament tow |
EP2193229A4 (en) * | 2007-08-02 | 2012-12-26 | Celanese Acetate Llc | Nonwoven from bulked filament tow |
US8461066B2 (en) * | 2007-08-02 | 2013-06-11 | Celanese Acetate Llc | Nonwoven from bulked filament tow |
US9297099B2 (en) | 2007-08-02 | 2016-03-29 | Celanese Acetate Llc | Nonwoven from bulked filament tow |
US20110172624A1 (en) * | 2008-09-22 | 2011-07-14 | Lenzing Aktiengesellschaft | Use of lyocell fibers as well as articles containing lyocell fibers |
CN106536798A (en) * | 2014-06-24 | 2017-03-22 | 可隆工业株式会社 | Filament web type precursor fabric for activated carbon fiber fabric and method for preparing same |
US10596545B2 (en) | 2014-06-24 | 2020-03-24 | Kolon Industries, Inc. | Filament web type precursor fabric for activated carbon fiber fabric and method for preparing same |
Also Published As
Publication number | Publication date |
---|---|
EP1595017A1 (en) | 2005-11-16 |
EP1595017B1 (en) | 2012-08-22 |
GB0303295D0 (en) | 2003-03-19 |
WO2004072347A1 (en) | 2004-08-26 |
JP2006518427A (en) | 2006-08-10 |
US7361241B2 (en) | 2008-04-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7361241B2 (en) | Filamentary nonwoven bandage fabric | |
US8663408B2 (en) | Wave-like structures bonded to flat surfaces in unitized composites and methods for making same | |
TWI600814B (en) | Bulky nonwoven fabric and method for manufacturing the same and product | |
US20070116928A1 (en) | Sheet slitting forming belt for nonwoven products | |
EP0418493A1 (en) | A nonwoven composite fabric combined by hydroentangling and a method of manufacturing the same | |
JPH07503291A (en) | Processing stable nonwoven fabric | |
JP3934916B2 (en) | Stretchable nonwoven fabric and method for producing the same | |
EP1292729B1 (en) | Non woven textile structure incorporating stabilized filament assemblies | |
JPS621027B2 (en) | ||
JP2951549B2 (en) | Nonwoven fabric excellent in bulk recovery and method for winding the nonwoven fabric | |
US4753839A (en) | Stretchable fabric | |
JP3217630B2 (en) | Stretchable nonwoven fabric and method for producing the same | |
WO2002024999A2 (en) | Nonwovens from polytrimethylene terephthalate based staple fibres | |
JPH0465562A (en) | Polyolefinic stretchable nonwoven fabric and production thereof | |
CN111748911B (en) | Nonwoven fabric, method for producing the same, fastening tape, wound covering material, and absorbent article | |
JP5033716B2 (en) | Fiber structure | |
JP2003236965A (en) | Cushion material, manufacturing method therefor, and manufacturing equipment used therefor | |
JP2003033586A (en) | Cushion material, production method thereof and production apparatus used therefor | |
US20200102678A1 (en) | Method for producing fiber molded body | |
WO2004035902A1 (en) | Composite materials containing fully stabilized filament assemblies | |
KR20140116598A (en) | Spunlaced nonwoven fabrics, wet tissue comprising the same, and method for preparing the same | |
JP5570041B2 (en) | Method for producing grain-like laminated nonwoven fabric | |
JP3213460B2 (en) | Method for producing biodegradable laminated nonwoven structure | |
JPH09122172A (en) | Integrated bond material of gauze and absorbent cotton and its production | |
JPH0147585B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FLEISSNER GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BARTH, GEORG MARTIN;CARUS, EDMUND HUGH;REEL/FRAME:016988/0017;SIGNING DATES FROM 20050902 TO 20050927 Owner name: BARTH, GEORG MARTIN, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BARTH, GEORG MARTIN;CARUS, EDMUND HUGH;REEL/FRAME:016988/0017;SIGNING DATES FROM 20050902 TO 20050927 Owner name: CARUS, EDMUND HUGH, UNITED KINGDOM Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BARTH, GEORG MARTIN;CARUS, EDMUND HUGH;REEL/FRAME:016988/0017;SIGNING DATES FROM 20050902 TO 20050927 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: TRUTZSCHLER NONWOVENS GMBH, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:FLEISNER GMBH;REEL/FRAME:028803/0834 Effective date: 20110513 Owner name: TRUTZSCHLER NONWOVENS GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BARTH, GEORG MARTIN;REEL/FRAME:028804/0465 Effective date: 20120710 Owner name: TRUTZSCHLER NONWOVENS GMBH, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:FLEISSNER GMBH;REEL/FRAME:028803/0834 Effective date: 20110513 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20160422 |